how bad is .5 ohm

[rumple4skin 10+ year member]

the point is tuneing correctly

 

[2002XLT 5,000+ posts]

Kind of.. Kind of not.

All im really trying to say, is that you cant just hap-hazardly turn the gain up like many people (read noobs) do and think that your getting more "powa." It doesnt work like that, the gain is used to enable you to get the input sensitivity from your headunit and amp to match up and thus providing adaquate output, (what you want it to put out without clipping) There are ways to test for this using a DMM, oscilliscope, or if you have good ears you can usually get pretty close, but math is usually dead-on and my ears **** so i use a DMM.

sorry man i whould hope you asume that i knew what i was doing and not being a tard about it

Dude, stick around this forum long enough and read some of the threads and you will understand. What if i assumed that and you DIDNT know how to properly set something and you fried your sht?

 

[2002XLT 5,000+ posts]

can you give me a fact that is not just a dial in a component set, there all just dials look at what its made out of

lol, jesus christ, this why i have been saying BY DEFINITION yes it is a fcking dial, you turn it, its a knob, but you have to tune it properly. God ****, im done with this thread, ive said more then was needed, figure it out on your own.

 

[rumple4skin 10+ year member]

ROFL, ok man ill give you that. i am freash to this site, but i am no tard. i like my stario and im a novice tho and really have enjoyed talking with you and you have tought me alot. we have just sat on this point to long. i think we have proven that if i dont do it wrong and make exstra sure not to over power the subs that i can prob do this. my origonal qustion should have been worded difrantley. i should have asked if it was ok for the hifonics, and if i whould do it

 

[miker 5,000+ posts]

All im really trying to say, is that you cant just hap-hazardly turn the gain up like many people (read noobs) do and think that your getting more "powa." It doesnt work like that, the gain is used to enable you to get the input sensitivity from your headunit and amp to match up and thus providing adaquate output, (what you want it to put out without clipping) There are ways to test for this using a DMM, oscilliscope, or if you have good ears you can usually get pretty close, but math is usually dead-on and my ears **** so i use a DMM.


Dude, stick around this forum long enough and read some of the threads and you will understand. What if i assumed that and you DIDNT know how to properly set something and you fried your sht?

Alright.. It's just that using a DMM doesn't exactly make sense to me..

You take the ohm load, and the desired watts, right? The more watts you want, the higher voltage you will want your end result to be, The higher up the gain will be turned... SO to me that doesn't make a difference, you're just turning it to an EXACT setting, not to an "adequate" one.

 

[rumple4skin 10+ year member]

ya but its a standard to go by instead of just doing it blind or by ear how ever you want to call it. as i said its just something i whould like to try and if i like it that way i can take it to a local shop and have them tune it exsactly with the osiloscop for 15 bucks( as aposed to them trying to *** **** me)

 

[rumple4skin 10+ year member]

no matter what nothing will be the same as the osiloscope

 

[Haunz 10+ year member]

see that is what i was thinking as well man but half these guys said no

Don't worry about that... I wouldn't trust half the members of this forum to install toilet paper in my bathroom... //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

Also step #1 and #3 in this guide are flat out WRONG: http://www.subwoofertools.com/forum/setgain.asp

You probably should set your gain with a DMM... the tone should be at 0db and if it's not a true RMS meter then the tone should be pure sine at 60Hz...

Now, what your biggest concearn should be is not trying to exceed the current capacity of the amplifer... we all know the hifonics amps are a bit overrated, but I will assume it still has a current capacity of 40 amps....

From ohms law that basically means that at .5ohms you don't want the output to try and exceed 20 volts (or 800 watts) or the amp will start to run into heavy clipping; and you risk running out of the safe operating area for the powersupply and output fets...

 

[miker 5,000+ posts]

Hey.. anybody.. How can you tell if your amp is sending a clipped signal???

 

[2002XLT 5,000+ posts]

Alright.. It's just that using a DMM doesn't exactly make sense to me..
You take the ohm load, and the desired watts, right? The more watts you want, the higher voltage you will want your end result to be, The higher up the gain will be turned... SO to me that doesn't make a difference, you're just turning it to an EXACT setting, not to an "adequate" one.

Up to a certain point, i suppose yes.

Here is the forumla and a example.

Voltage of the output = sqrt(RMS Power X impedance of the speaker)

Example

Say the amp provides 100WRMS into a 4 ohm speaker:

Voltage = sqrt(100W X 4 ohms)

Voltage = sqrt(400W*ohms)

Voltage = 20V

But if i needed 200 watts, i cant just double the voltage and expect my amp to put that out.

 

[J31Rob 5,000+ posts]

ROFL, ok man ill give you that. i am freash to this site, but i am no tard. i like my stario and im a novice tho and really have enjoyed talking with you and you have tought me alot. we have just sat on this point to long. i think we have proven that if i dont do it wrong and make exstra sure not to over power the subs that i can prob do this. my origonal qustion should have been worded difrantley. i should have asked if it was ok for the hifonics, and if i whould do it

fresh*

stereo*

a lot*

taught*

extra*

original*

question*

differently*

would*

Jesus.

 

[2002XLT 5,000+ posts]

Don't worry about that... I wouldn't trust half the members of this forum to install toilet paper in my bathroom... //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif
Also step #1 and #3 in this guide are flat out WRONG: http://www.subwoofertools.com/forum/setgain.asp

You probably should set your gain with a DMM... the tone should be at 0db and if it's not a true RMS meter then the tone should be pure sine at 60Hz...

Now, what your biggest concearn should be is not trying to exceed the current capacity of the amplifer... we all know the hifonics amps are a bit overrated, but I will assume it still has a current capacity of 40 amps....

From ohms law that basically means that at .5ohms you don't want the output to try and exceed 20 volts (or 800 watts) or the amp will start to run into heavy clipping...

like i said, it was a simple instruction to give an idea of what to do.

 

[rumple4skin 10+ year member]

well i wanted to know what i can do safly

and all of you gave me the rockford hook it up to 2 ohms dont fry what i sold you cuz its on warenty, rofl

sorry i bought the ****ing thing to pound it

 

[rumple4skin 10+ year member]

sorry to have misspelled, i bet you cant corect me on my stario shit tho

 

[2002XLT 5,000+ posts]

Hey.. anybody.. How can you tell if your amp is sending a clipped signal???

YES, WITH A FCKING DMM.